just one question:
how do you connect the ten jacks on the patch panel?

thanks .

the red and black are the hot and cold from the speakon.
the blues are signals from the deflection board: (from left) vertical and vertical ground + horizontal and horizontal ground.
the yellow ones are yoke inputs: (from left) vertical and vertical ground + horizontal and horizontal ground.

the pictures and video are made whit "Censtron version b"-patch.
(look first post for diagrams)_________________Association of experimental electronics
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i have used my home amp for this - if you turn the volume up you get bigger waves .. the actual values change when different TV-units are used. just try whit the amp you have. start from 0 and slowly turn the volume up as far as you want or you can build some small amp for this - and try if it's good if not build a bigger one and use the smaller on some other application _________________Association of experimental electronics
www.koelse.orgflickr: cable porn group

somewhere in this topic i've read that old TVs are betther than modern.

modern TV's and computer displays have error detection, and when they detect some kind of error they automatically shutdown. and that's no fun at all _________________Association of experimental electronics
www.koelse.orgflickr: cable porn group

i have got many questions to my e-mail about this so i think people are building these units. So ...
if you have build one please post comments and pics here.
+ if you have any questions please post them here.
this way others can learn from our mistakes and success.

Hi Super - nice to hear that your TV arrived and you have opend it successfully but...as i said earlier:

dnny wrote:

and if you decide to do this project don't add the extra coil/yoke for the extra bright beam. it will fry you TV

i will ad to this that it may fry something else also maybe cause a fire ...or something unpleasant - so please dot try random coils.

the perfect dummy would be the exact value the original Horizontal coil is.

i know this sounds silly but have you tried to adjust the brightness from the brightness-knob?

SuperKoopa wrote:

what kind of dummy yoke you have used? where you have found it?

i used the wrong kind and it fry my first TV. _________________Association of experimental electronics
www.koelse.orgflickr: cable porn groupLast edited by dnny on Sun Aug 13, 2006 3:38 am; edited 1 time in total

i know this sounds silly but have you tried to adjust the brightness from the brightness-knob?

yes i have tried and this don't work

sorry i have disobeyed to your warnings and i've found a perfect coil.
i have removed some turns from an old transformer and everything seems to work.
i have kept the power on for at least one hour and nothing has exploded.

I haven't built it yet but this afternoon i must go to Cagliari (55 Km from my city) at my favorite (and the only a bit eqipped with diy stuff in sardinia) eletronic shop to buy some RCA jacks and other stuff for my SL.

i will add an old stereo computer speaker amplifier and ten RCA jacks to make this unit completely patchable!

in this way you can amplify also the vertical board signal and put this to Horizzontal coil plugs to obtain a modulated horizzontal line (not vertical like in the classic version)

i have never tryed whit a color set, but if you get the horizontal line it should be enough. keep the horizontal line and then ad amplified audio signal to the vertical coil and that should get you the effect.

on some newer TV's the problem is that there is some kind of error detection and if they detect any error they will automatically shutdown._________________Association of experimental electronics
www.koelse.orgflickr: cable porn group

I'll give you one possible proviso on that: On a colour set it could give you multicoloured fun that an oscilloscope would not, especially on an old delta gun set with three audio coils arranged around the tube neck, driven with maybe L, R, and L+R. But bear in mind the much higher power of the EHT on colour sets especially the old delta gun monsters. And don't forget to make sure you keep all your circuits completely isolated from any metal in the telly including the chassis bits which look like ground - as they are frequently at full current 1/2 mains voltage relative to mains earth or neutral.

No don't. And see above where it says "If you don't know what this means, don't open the back." The set might not be isolated. This means that the 0V rail inside the TV is likely to be at half mains voltage. Also I repeat, it's pointless for monochrome, as perfectly good old oscilloscopes are about 20USD.

Ok, i used a seperate DC adaptor to power the pre amp and it worked fine for a while.

After about 3 minutes of playing music through the preamp and into the TV i felt the pot on the preamp and i was really hot. So i took it apart and the IC chip has got a big crack all the way along it!

Does anybody know why this would of happened? I'm guessing it's something to do with the TV rather than the preamp because it was a kit bought from maplin.

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